electricity meter readings

my meter is in low and high readings and not day or night.
which one is which?

Off-peak (low) will be the night rate and peak (high) will be the day rate.

Hi there @teelacker as @198kHz says the low is usually the night reading, but if you want to be super sure the best way is to take two readings an hour apart or so during the day and see which reading has changed-that’ll be the day (or you could do it at night if that’s more convenient)